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a in (-oo:+oo)
a-((3*(a-3))/10)-(2/9) = 3*a+6/3 // - 3*a+6/3
a-((3*(a-3))/10)-(3*a)-(2/9)-(6/3) = 0
(-3/10)*(a-3)+a-3*a-2/9-2 = 0
a-3/10*(a-3)-3*a-2/9-2 = 0
(-3/10*9*(a-3))/9+(9*a)/9+(-3*9*a)/9-2/9+(-2*9)/9 = 0
9*a-3/10*9*(a-3)-3*9*a-2*9-2 = 0
63/10*a-27*a-18-2+81/10 = 0
81/10-207/10*a-18-2 = 0
61/10-207/10*a-18 = 0
-207/10*a-119/10 = 0
(-207/10*a-119/10)/9 = 0
(-207/10*a-119/10)/9 = 0 // * 9
-207/10*a-119/10 = 0
-207/10*a-119/10 = 0 // + 119/10
-207/10*a = 119/10 // : -207/10
a = 119/10/(-207/10)
a = -119/207
a = -119/207
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